Add Hundredths and Thousandths less than 10: Horizontal Addition Worksheet

When adding decimals, students line up the decimal points and add extra zeros to the right of the number so that each decimal has the same number of digits. Students then add digits at each place to find the sum. In this worksheet, students practice solving problems written in the horizontal format. How numbers are laid out in a problem affects the method a student employs to solve it. Therefore to develop actual fluency and mastery of multiple strategies, students must practice different formats.